Editing Guide to mapping (section)

=== Gas tanks and filters ===

Each station should have a full set of these - or at the bare minimum, one for N2, one for O2 and a third tank to filter dangerous gases into.

[[File:Atmos mapping.jpg|right|frame|Left to right: N2, O2, Airmix. The canisters inside are just for decoration.]]

Each gas tank needs:
* '''Outside''': A tank computer and a gas filter to pick what gases will be filtered into it.
* '''Inside''': A gas injector (input), a vent pump (output), a gas sensor and a specific turf.

The tank computer controls the input/output and receives data from the gas sensor.

The specific turf creates the gases that will be inside each tank - the gas canister is just for decoration.

Let's take a look at the MetaStation N2 tank:

* '''Tank computer''': /obj/machinery/computer/atmos_control/tank/nitrogen_tank
* '''N2 filter''': /obj/machinery/atmospherics/components/trinary/filter/atmos/n2
* '''Gas injector''': /obj/machinery/atmospherics/components/unary/outlet_injector/atmos/nitrogen_input
* '''Vent pump''': /obj/machinery/atmospherics/components/unary/vent_pump/siphon/atmos/nitrogen_output
* '''Gas sensor''': /obj/machinery/air_sensor/atmos/nitrogen_tank
* '''Turf''': /turf/open/floor/engine/n2

These objects have all the neccessary vars preset and start switched on - you'll only have to edit the dir if neccessary.

Additionally, you'll want this type of gas mixer for the airmix tank (N2 + O2):

* '''Air mixer''': /obj/machinery/atmospherics/components/trinary/mixer/airmix